Dentoalveolar and skeletal changes after 2-year anterior open bite treatment with bonded spurs associated with build-ups versus conventional bonded spurs: a randomized clinical trial

• Ano de defesa: 2022
• Autor(a) principal: Maranhão, Olga Benário Vieira
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Biblioteca Digitais de Teses e Dissertações da USP
• Palavras-chave em Português: Bonded spurs; Build-ups; Dentadura mista; Esporão colado; Mixed dentition; Mordida aberta; Open bite
• Link de acesso: https://www.teses.usp.br/teses/disponiveis/25/25144/tde-20042022-105041/

Objective: To compare the dentoalveolar effects of early treatment of the anterior open bite with bonded spurs associated with build-ups versus conventional bonded spurs after 24 months. Material and methods: Fifty patients, between 7 and 11 years of age (32 female and 18 male), with open bite malocclusion were randomly assigned into two groups. The experimental group initially comprised 25 patients treated with bonded spurs associated with build ups. The comparison group initially comprised 25 patients treated only with bonded spurs. The measurements were performed on digital dental casts, obtained with TRIOS® intraoral scanner (3Shape A/S, Copenhagem, Dinamarca) at baseline (T1) and after 24 months of treatment (T2). Overbite, overjet, vertical development of incisors and first permanent molars, maxillary and mandibular arches perimeter and length, palatal depth, inter-canine and inter-first permanent molar width were measured at T1 and T2. Shapiro-Wilk tests were used to test normal distribution and sex distribution was analyzed with Fisher exact test. Intergroup comparisons regarding age, primary and secondary outcome measurements were performed with t or Mann-Whitney U tests, depending on normal distribution. The SPSS software (version 25; IBM, Armonk, NY) was used to perform the statistical analyses at a significance level of P<0.05. Results: During treatment, 3 patients in the experimental and 1 in the comparison group were lost. After 24 months, similar results were found in both groups. The overbite increased and the open bite remained in only one patient in the comparison group. Conclusions: Both groups presented similar results regarding overbite improvement and dental arch dimensional changes. The use of build-ups did not produce greater molar vertical development restriction after 24 months of treatment. A treatment time of 24 months was more efficient to correct severe anterior open bite patients than 12 months